Em Converter

Em-Converter.markdown

Em Converter

Need to quickly calculate ems while developing? Enter in your base, desired font size, and get to work.

Forked from Chris Deacy's Pen Em Converter.

A Pen by Sonya Corcoran on CodePen.

License.

index.jade

.calculator
	.input
		input#base(type="number",placeholder="15",value="16")
		label(for="base") carb ex. (g)
	i.fa.fa-angle-double-right
	.input
		input#em(type="number",placeholder="1",value="1")
		label(for="em") unit of insulin
	.input.last
		input#output(type="number",placeholder="15",value="16")
		label(for="output") total carbs (g)

script.coffee

update = (input) ->

	$base = $('#base')
	$em = $('#em')
	$output = $('#output')

	switch input
		when 'base'
			$output.val $base.val() * $em.val()
		when 'em'
			$output.val $base.val() * $em.val()
		when 'output'
			$em.val $output.val() / $base.val()

$(document).ready ->

	$('.input input').on 'keyup change', ->
		update $(@).attr 'id'

style.scss

* {
	margin: 0;
	padding: 0;

	&,
	&:before,
	&:after {
		box-sizing: inherit;
	}
}

html {
	font-size: 16px;
	box-sizing: border-box;
}

body {
	background-color: #ecf0f1;
	font-family: "Open Sans", sans-serif;
}

.clear:after {
	content: "";
	display: table;
	clear: both;
}

.calculator {
	background-color: #3498db;
	width: 448px;
	height: 110px;
	line-height: 100px;
	margin: auto;
	padding: 20px;
	position: absolute;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	border-radius: 8px;
	@extend .clear;

	.input {
		width: 100px;
		height: 80px;
		float: left;

		input {
			display: block;
			background-color: #fff;
			width: 100px;
			height: 60px;
			border: 0;
			font-size: 2em;
			text-align: center;
			border-radius: 5px;
		}

		label {
			display: block;
			height: 20px;
			line-height: 20px;
			font-size: .8em;
			color: #fff;
			text-align: center;
		}

		&.last {
			margin-left: 10px;
		}
	}

	.fa {
		display: block;
		height: 60px;
		margin: 0 35px;
		float: left;
		line-height: 60px;
		font-size: 3em;
		color: #fff;
	}
}